1 files changed, 3 insertions, 3 deletions
diff --git a/Modules/_io/bufferedio.c b/Modules/_io/bufferedio.c
index c6373c6680..18cf1cac73 100644
--- a/Modules/_io/bufferedio.c
+++ b/Modules/_io/bufferedio.c
@@ -1513,7 +1513,7 @@ static PyMethodDef bufferedreader_methods[] = {
 };
 
 static PyMemberDef bufferedreader_members[] = {
-    {"raw", T_OBJECT, offsetof(buffered, raw), 0},
+    {"raw", T_OBJECT, offsetof(buffered, raw), READONLY},
     {NULL}
 };
 
@@ -1896,7 +1896,7 @@ static PyMethodDef bufferedwriter_methods[] = {
 };
 
 static PyMemberDef bufferedwriter_members[] = {
-    {"raw", T_OBJECT, offsetof(buffered, raw), 0},
+    {"raw", T_OBJECT, offsetof(buffered, raw), READONLY},
     {NULL}
 };
 
@@ -2286,7 +2286,7 @@ static PyMethodDef bufferedrandom_methods[] = {
 };
 
 static PyMemberDef bufferedrandom_members[] = {
-    {"raw", T_OBJECT, offsetof(buffered, raw), 0},
+    {"raw", T_OBJECT, offsetof(buffered, raw), READONLY},
     {NULL}
 };